Puppet-valve



(No Model.)

H. P. PRISME. `PU'PPBI VALVE.

Patented May 6, 1884.

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VeIZZ/I N.PETE`R5, Phawulhngnpm. washington. D. c.

" UNITED ASTATES PATENT OFFICE.

HAMLINF. missin, OF ciNoiNNArr, OHIO.

SPECIFICATION forming part of Letters Patent No. 298,194, dated May 6,1884. Appueanen tied December 18,1883. (No modem To all whom t mayconcern:

Be it known that I, I-IAMLIN F. FRrsBIE, a citizen of the United States,residing at Oincinnati, inthe county of Hamilton and State of Ohio, haveinvented certain new and useful Improvements in PuppetValves, of whichthe following is a specification.

The object of the first part of my invention is to employ twopuppet-valves which are so constructed as to be placed over a singleopening leading from the steam-chest into the cylinderfand soconstructed that one of the valves will act as an exhaust and the otheras a supply or feeding valve, each being provided with a suitableannulus, so that the pressure of steam tends to hold both valvesnormally closed.

The object of the second part of my invention is to construct an outsidecylindrical puppetvalve in such a Way that the steam in the cylindertends' to. hold the valve closed, and allow it to escape from thebottom, thereby allowingit tobeseated over the same opening as thesupply-valve, yet without any liability of escaping the steam,exceptwhenraised by the eccentric or other means for lifting it.

Figure l is a vertical central section of my improvement applied to asteamcylinder. Fig. 2 is a top plan view of the same; Fig. 3, across-section on line x, Fig. 2; Fig. 4, a bottom plan view of theescape-valve.

A represents a cylinder.

B represents the steam-chest on side pipe from which the piston issupplied at each end alternately.

C represents the exhaust-pipe, which is preferably made parallel withthe steam-chest B and placed above the cylinder A. The steam-chest B andthe exhaust-pipe" C are each provided with an opening, D E, at each end,which communicates directly with the ends of the cylinderA, as shown inFig. 1, formingasidepipe nozzle. Each end of lthe cylinder is providedwith the same valves, connecting with the exhaust and steam chests orpipes in the same manner as shown in Fig. 1.

-F represents the supply-pipe, connected to the steam-chest B, as shownin Fig. 3. G represents the escape-pipe, connected to the pipe c in asimilar manner.

H represents an inside cylindrical valve, suitably supported in thevalvechest I by ,means of the piston-cap .I K. These parts are securedto the flange of the valve-chest I by bolts in the ordinary manner.

z' 'i represent packingrings fitted in grooves around thecylinder-valve. v

a represents the valveseat above the port D, leading into the cylinderA. In order to hold this valve to the seat under steam-pressure duringthe period of exhausting, Iprovide an annular projection, Z, upon theoutside of the valve H and below the cap J, f a larger area than theexposed area of the bottom of the annulus or ring inside of thevalve-seat, so that the pressure of the steam on the valve will hold itto its seat. These areas are so constructed in connection with theannular seat that when the valveH is opened the areas are the same andthe valves balanced under the pressure of the steam.

M "represents an outside cylindrical valve;

N, a cylindrical piston-cap projecting downward inside of the valve M;m, packingrings` placed on the cap N.

.a n represent an annular iiange secured to the cap N, and fitting acorresponding flange, a', formed on the valve chest O. Similar flanges,O', are provided at the bottom of the cylinder O, so as to secure thecap N to the valve-chest, and the valve-chest O to the cylinder-nozzleE.

In order to hold the valve M down to its seat during the period ofsupplying steam to the piston, I provide an annulus, c, above theannular seat d, of a larger area than the annulus formed inside of theseat at d. This annulus c, being greater than the annulus inside of theseat exposed to the action of the steam, is subject to the directpressure of the steam in the cylinder A, and it thus holds the valve Mdown upon its seat, preventing any tendency to rise under thesteam-pressure while the steam is admitted into port D. Wh en the valveM is raised, the annulus c has the same exposed area as the bottom ofthe valve, and it is balanced when open, so as to be moved freely. Thismode of constructing the exhaust valve and port connecting into-the samecylinder-opening as the feed-valve effects a very important saving inthe condensation of steam, and occupies a more direct action inexhausting, and lessens the cost of con- IOO struction. This modeoiconneeting two valves through one opening is mueh more simple,cheap,and direct than the improvements hitherto used for that purpose.

It is obvious that the valves and valve-Chests, ports, andcylinder-openings are duplicated upon each end of the cylinder of theengine and Work through proper mechanism. It is evident that thesevalves may be used with any otherI form of engine aswell as with steam.Instead of the annulus b c, other projections to furnish the properamount of pressure-surface might be employed.

I claim* l. In combination with the cylinder A, the cylindrical valve H,provided with an annulus, I), and the cylindrical valve M, provided withthe annulus c, adapted to operate as snpply and exhaust Valves, cominunieating directly with the cylinder A, substantially as herein setforth.

2. In combination with the cylinder A, the ports D E, communicating at011e side with an inside valve, H, and annulus b, and on the other sidean outside valve, M, provided with the inside annulus, c, whereby thevalves are adapted to act as supply and exhaust valves, to be held inthe seats by steam-pressure, substantially as herein set forth.

3. The outside annular cylindrical valve,M,

in combination with theinside cylindrical cap, N, and provided with aninside annulus, e, of greater area than the annulus inside of theannular seat d, and adapted to actas an exhaustvalve and to be held inits seatby steam-pressure, substantially as described.

4. The cylindrical exhaust-valve M, of greater area than its port, andprovided with projecting ilanges c on its inside,so as to hold the valveto its seat by steam-pressure, substantially as herein set forth.

In testimony whereof I have hereunto set my hand.

IIAMLIN F. FRISBIE.

Witnesses:

JXo. E. JoNns, A. GLUonoWsKY.

